Dry ice [ Return towards  Transport under controlled temperature  ]

By a natural phenomenon, solid CO₂ (-78°C) is subliming into cold gas. This cold gaseous atmosphere enables the preserving of chilled and frozen goods. Solid CO₂ is an efficient (150 frigories per kilogram at -78°C) and autonomous source of cold, without any residue after sublimation.

It is available under different forms:

• Snow resulting from a pressure drop of liquid CO₂
• ALIGAL dry ice: dry ice resulting from a snow compaction in blocks, slices or sticks

The quantity of snow or dry ice necessary to the preserving of food products is depending on:

• K: The insulation coefficient of the used container (isothermal container, insulated packaging…)
• S: The exchange surface of the same container
• (ΔT): The difference between the temperature of the transported product and the outside temperature 
• (h): The duration of the logistic journey

According to the following formula: Q = (K*S*ΔT*h)/150